Office chair



FIG. 1 is a perspective view of the office chair;

FIG. 2 is a front side view of the office chair;

FIG. 3 is a back side view of the office chair;

FIG. 4 is left side view of the office chair;

FIG. 5 is a right side view of the office chair;

FIG. 6 s a top view of the office chair; and,

FIG. 7 is a bottom view of the office chair.

The broken lines on the FIGS. 1–7 are directed to environment and form no part of the claimed design. 

I claim the ornamental design for the office chair, as shown and described. 